rockchip: rk3288: use spl_early_init() instead of spl_init()

Use spl_early_init() to make sure that early malloc() is initialised. This
fixes booting on firefly-rk3288, for example.

Signed-off-by: Eddie Cai <eddie.cai.linux@gmail.com>
Signed-off-by: Simon Glass <sjg@chromium.org>
Reviewed-by: Eddie Cai <eddie.cai.linux@gmail.com>

arch/arm/mach-rockchip/rk3288-board-spl.c

@@ -184,9 +184,9 @@ void board_init_f(ulong dummy)
 	debug_uart_init();
 #endif
 
-	ret = spl_init();
+	ret = spl_early_init();
 	if (ret) {
-		debug("spl_init() failed: %d\n", ret);
+		debug("spl_early_init() failed: %d\n", ret);
 		hang();
 	}